Organic light emitting display device having a non-display area dam structure

ABSTRACT

Disclosed is an organic light emitting display device including a dam structure disposed in a non-display area of a substrate and an alignment mark disposed outside the dam structure. The alignment mark is not covered by, and does not overlap with, the dam structure, because the alignment mark is disposed outside the dame structure. Thus, a scribing process may be performed smoothly.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.15/362,412, filed Nov. 28, 2016, which claims the benefit of KoreanPatent Application No. 10-2015-0190595 filed on Dec. 31, 2015, which arehereby incorporated by reference as if fully set forth herein.

BACKGROUND Field of the Invention

The present invention relates to an organic light emitting displaydevice, and to an align mark necessary for a scribing process which isperformed for obtaining a plurality of unit panels from a mothersubstrate.

Discussion of the Related Art

Organic light emitting display devices are display devices thatself-emit light, and have a structure where an organic emission layer isformed between a cathode and an anode. Due to this structure, anelectron supplied from the cathode and a hole supplied from the anodeare injected into the organic emission layer to generate an exciton, andthe generated exciton shifts from an excited state to a ground state toemit light.

The organic light emitting display devices are obtained through aprocess where a plurality of unit panels (U/P) are provided on a mothersubstrate and then are cut through a scribing process. Hereinafter, arelated art organic light emitting display device will be described withreference to FIGS. 1A to 1C.

FIGS. 1A to 1C are schematic illustrations of a process of manufacturinga related art organic light emitting display device.

First, as shown in FIG. 1A, a plurality of unit panels U/P are providedon a mother substrate 1 a. In the drawings, only two unit panels U/P areillustrated for convenience.

First alignment marks 2 for a first scribing process are formed at thecorners of the mother substrate 1 a, and second alignment marks 3 for asecond scribing process are formed at the corners of each of theplurality of unit panels U/P.

Subsequently, as shown in FIG. 1B, a first scribing process is performedby using the first alignment marks 2 to obtain a. plurality of unitpanels U/P.

In this case, a test area T/A is provided in each of the plurality ofunit panels U/P, and a test process is performed for each of the unitpanels U/P.

Subsequently, as shown in FIG. 1C, a second scribing process isperformed by using the second alignment marks 3 formed in each of theunit panels U/P, and the test area T/A is removed from the each of theunit panels U/P.

As described above, the related art organic light emitting displaydevice is manufactured using the first scribing process based on thefirst alignment marks 2 and the second scribing process based on thesecond alignment marks 3. However, the second alignment marks 3 are noteasily and clearly observable during the second scribing process. Thus,the second scribing process is not performed smoothly.

In FIG. 1C, the enlarged portion corresponds to a cross-sectionalsurface of an area where a second alignment mark 3 is formed. In thiscase, each of the second alignment marks 3 are formed on a substrate 1,an encapsulation layer 5 for preventing penetration of water is formedon each of the second alignment marks 3, and an encapsulation substrate7 is provided on the encapsulation layer 5.

As described above, in the related art, since the encapsulation layer 5is formed on the second alignment marks 3, the second alignment marks 3are not easily observable, and the second scribing process for removingthe test area T/A from each of the unit panels U/P is not performedeasily or smoothly.

SUMMARY

Accordingly, the present application provides an organic light emittingdisplay device that substantially obviates one or more problems due tolimitations and disadvantages of the related art.

An aspect of the present disclosure provides an organic light emittingdisplay device in which an alignment mark is easily and clearlyobservable, and thus, a scribing process can be performed smoothly.

To achieve these and other advantages and in accordance with the purposeof the invention, as embodied and broadly described herein, there isprovided a dam structure disposed in a non-display area of a substrateand a first alignment mark disposed outside the dam structure. In thiscase, the dam structure includes a first dam structure arranged in afirst direction, a second dam structure arranged in a second direction,and a third dam structure connected at an incline to each of the firstdam structure and the second dam structure, and the first alignment markis disposed outside the third dam structure.

In another exemplary embodiment, the first dam structure and the seconddam structure are arranged in parallel with an outermost line of theactive area in the first direction and an outermost line of the activearea in the second direction, respectively, and the third structure isarranged apart from, and at an angle to, a vertex at which the outermostline of the active area in the first direction meets the outermost lineof the active area in the second direction.

In another exemplary embodiment, the first dam structure comprises afirst sealant, a first outer dam bank disposed on an outer side of thefirst sealant, and a first inner dam bank disposed on an inner side ofthe first sealant, the second dam structure comprises a second sealant,a second outer dam bank disposed on an outer side of the second sealant,and a second inner dam bank disposed on an inner side of the secondsealant, the third dam structure comprises a third sealant, a thirdouter dam bank disposed on an outer side of the third sealant, and athird inner dam bank disposed on an inner side of the third sealant, oneend of the third sealant is connected to the first sealant, and theother end of the third sealant is connected to the second sealant, oneend of the third outer dam bank is connected to the first outer dambank, and the other end of the third outer dam bank is connected to thesecond outer dam bank, and one end of the third inner dam bank isconnected to the first inner dam bank, and the other end of the thirdinner dam bank is connected to the second inner dam bank.

In another exemplary embodiment, a distance between the third inner dambank and a vertex at which an outermost line of the active area in thefirst direction meets an outermost line of the active area in the seconddirection is equal to or greater than a distance between the first innerdam bank and the outermost line of the active area in the firstdirection or the distance between the second inner dam bank and theoutermost line of the active area in the second direction.

In another exemplary embodiment, at least one of the third outer dambank and the third inner dam bank has a concave-convex structure.

In another exemplary embodiment, the first alignment mark is disposed onan extension line of the first dam structure or the second damstructure.

In another exemplary embodiment, the first alignment mark is disposedinward from an extension line of the first dam structure or the seconddam structure.

In another exemplary embodiment, the substrate comprises a pad area inthe non-display area, and a second alignment mark is further provided inthe pad area.

In another exemplary embodiment, the dam structure is not disposed inthe pad area.

In another exemplary embodiment, the third dam structure has arectilinear structure.

In another exemplary embodiment, the third dam structure has a curvestructure.

In another exemplary embodiment, the curve structure is convex in anouter direction.

In another exemplary embodiment, the curve structure is convex in aninner direction.

In another exemplary embodiment, the substrate comprises a pad area inthe non-display area, and a second alignment mark is disposed outsidethe third dam structure such that the second alignment mark does notoverlap with the pad area.

In another exemplary embodiment, the dam structure is not disposed inthe pad area.

In another exemplary embodiment, the display device further comprises asecond substrate; and a filler disposed between the first substrate andthe second substrate, and extending from the active area to an innerside of the dam structure.

Additional advantages and features of the present disclosure will be setforth in part in the description which follows and in part will becomeapparent to those having ordinary skill in the art upon examination ofthe following or may be learned from practice of the invention. Theobjectives and other advantages of the invention may be realized andattained by the structure particularly pointed out in the writtendescription and claims hereof as well as the appended drawings.

It is to be understood that both the foregoing general description andthe following detailed description of the present invention areexemplary and explanatory and are intended to provide furtherexplanation of the invention as claimed. However, the present inventionis not limited thereto, and may include additional features andalternate embodiments within the purview of the art.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings provide a further understanding of theinvention, and are incorporated in and constitute a part of thisapplication The accompanying drawings illustrate embodiments of theinvention and together with the description serve to explain theprinciple of the invention. In the drawings:

FIGS. 1A to 1C are plan views illustrating a process of manufacturing arelated art organic light emitting display device;

FIG. 2 is a cross-sectional view of an organic light emitting displaydevice according to a first embodiment of the present disclosure;

FIG. 3 is a plan view of an organic light emitting display deviceaccording to a second embodiment of the present disclosure;

FIG. 4 is an enlarged plan view of an area C of the organic lightemitting display device illustrated in FIG. 3;

FIGS. 5A and 5B are schematic views illustrating the position of a firstalignment mark according to various embodiments of the presentdisclosure;

FIG. 6 is a plan view of an organic light emitting display deviceaccording to a third embodiment of the present disclosure;

FIG. 7 is a plan view of an organic light emitting display deviceaccording to a fourth embodiment of the present disclosure;

FIG. 8 is a plan view of an organic light emitting display deviceaccording to a fifth embodiment of the present disclosure;

FIG. 9 is a plan view of an organic light emitting display deviceaccording to a sixth embodiment of the present disclosure;

FIG. 10 is a schematic plan view of an organic light emitting displaydevice according to a seventh embodiment of the present disclosure;

FIG. 11 is a schematic plan view of an organic light emitting displaydevice according to a eighth embodiment of the present disclosure;

FIG. 12 is a schematic plan view of an organic light emitting displaydevice according to a ninth embodiment of the present disclosure; and

FIG. 13 is a schematic plan view of an organic light emitting displaydevice according to a tenth embodiment of the present disclosure.

DETAILED DESCRIPTION OF THE INVENTION

Reference will now be made in detail to the exemplary embodiments of thepresent disclosure, examples of which are illustrated in theaccompanying drawings. Wherever possible, the same reference numberswill be used throughout the drawings to refer to the same or like parts.

Advantages and features of the present invention, and implementationmethods thereof will be clarified by the following embodiments describedwith reference to the accompanying drawings. The present invention may,however, be embodied in different forms and should not be construed aslimited to the embodiments set forth herein. Rather, these embodimentsare provided so that this disclosure will be thorough and complete, andwill fully convey the scope of the present application to those skilledin the art. The present invention is only defined by the scope of anyappended claims.

A shape, a size, a ratio, an angle, and a number disclosed in thedrawings for describing embodiments of the present disclosure are merelyexemplary, and thus, the present invention is not limited to theillustrated details. Like reference numerals refer to like elementsthroughout. In the following description, when the detailed descriptionof relevant known functions or configurations are determined tounnecessarily obscure the important points of the present disclosure,the detailed description will be omitted. The terms ‘comprise’, ‘have’,and ‘include’ in the present specification may include additional partsunless the term ‘only˜’ is also used with such terms. The terms of asingular form may include plural forms unless referred to the contrary.

In construing an element, an error range may be included even if noexplicit description regarding the same in included in thespecification.

In describing a position relationship, for example, when a positionrelation between two parts is described as ‘on˜’, ‘over˜’, ‘under˜’, or‘next˜’, one or more parts may be disposed between the two parts unlessthe term ‘just’ or ‘direct’ is also used with such terms.

In describing a time relationship, for example, when the temporal orderis described as ‘after˜’, ‘subsequent˜’, ‘next˜’, or ‘before˜’ a casewhich is not continuous may be included unless the term ‘just’ or‘direct’ is also used with such terms.

Although the terms “first”, “second”, etc. may be used herein todescribe various elements, these elements are not be limited by theseterms. These terms are only used to distinguish one element fromanother. For example, a first element could, alternatively, be termed asecond element, and, similarly, a second element could, alternatively,be termed a first element, without departing from the scope of thepresent disclosure.

Features of various embodiments of the present disclosure may bepartially or completely coupled to, or combined with, each other, andmay be variously inter-operated with each other and driven technicallyas those skilled in the art can sufficiently understand. Further, theembodiments of the present disclosure may be carried out independentlyfrom each other, or may be carried out together in co-dependentrelationship.

Hereinafter, various embodiments of the present disclosure will bedescribed in detail with reference to the accompanying drawings.

FIG. 2 is a cross-sectional view of an organic light emitting displaydevice according to a first embodiment of the present disclosure.

As shown in FIG. 2, the organic light emitting display device accordingto the first embodiment may include a first substrate 100, a secondsubstrate 200, a dam structure 300, a filler 400, and a plurality ofalignment marks 500 a and 500 b.

The first substrate 100 may be formed of glass or transparent plastic.An active area A/A, a non-display area ND/A, a pad area P/A, and anencapsulation area E/A may be provided on the first substrate 100.

A plurality of pixels P may be provided in the active area A/A, therebydisplaying an image. In order to display an image, a circuit devicelayer 110 and an emission device layer 120 may be disposed in the activearea A/A on the first substrate 100.

The circuit device layer 110 may be formed on the first substrate 100,and although not shown in detail, the circuit device layer 110 mayinclude a gate line, a data line, a power line, a switching thin filmtransistor (TFT), a driving TFT, and a capacitor. A detailedconfiguration of the circuit device layer 110 may be modified intovarious types well known to those skilled in the art.

The emission device layer 120 may be formed on the circuit device layer110, and although not shown in detail, the emission device layer 120 mayinclude a bank layer, an anode, a cathode, and an organic emission layerdisposed between the anode and the cathode. A detailed configuration ofthe emission device layer 120 may be modified into various types wellknown to those skilled in the art.

The non-display area ND/A may be an area that cannot display an image,and may be provided outside the active area A/A.

The pad area P/A may be disposed in the non-display area ND/A. Aplurality of signal pads connected to an external driver may be disposedin the pad area P/A. Therefore, the external driver may be connected tothe plurality of signal pads disposed in the pad area P/A and may applysignals to the active area A/A. In this manner, the pad area P/A may beexposed to the outside so as to be connected to the external driver. Inorder for the pad area P/A provided on the first substrate 100 to beexposed to the outside, the second substrate 200 may be shorter inlength than the first substrate 100, and moreover, the encapsulationarea E/A may not extend to the pad area P/A.

The encapsulation area E/A prevents water from penetrating into theactive area A/A. In order to prevent penetration of water, a passivationlayer 130 may be disposed on the emission device layer 120, the filler400 may be disposed on the passivation layer 130, and the dam structure300 may be disposed outside the filler 400. Therefore, an area where thepassivation layer 130, the filler 400, and the dam structure 300 aredisposed may correspond to the encapsulation area E/A. As a result, theencapsulation area E/A may include the active area A/A, an area wherethe dam structure 300 is disposed, and an area therebetween.

The passivation layer 130 may be formed on the emission device layer 120and may surround the emission device layer 120 and the circuit devicelayer 110. That is, the passivation layer 130 may cover a top and a sidesurface of the emission device layer 120 and a side surface of thecircuit device layer 110. The passivation layer 130 may include aninorganic insulating material such as silicon oxide, silicon nitride,and/or the like, and particularly, may have a structure where differentinorganic insulating materials are alternately stacked.

The filler 400 may be formed on, and/or surrounding, the passivationlayer 130, and particularly, and may fill the space between the firstsubstrate 100 and the second substrate 200. The filler 400 may include atransparent material for preventing penetration of water. The filler 400may further include an adhesive material, thereby enhancing an adhesiveforce between the first substrate 100 and the second substrate 200. Thefiller 400 may extend from the active area A/A to the non-display areaND/A, and particularly, may extend to the inside of the dam structure300.

The dam structure 300 may be disposed between the first substrate 100.The second substrate 200 and may bond the first substrate 100 to thesecond substrate 200, and an area between the first substrate 100 andthe second substrate 200 may be sealed by the dam structure 300. Theouter surfaces of the dam structures 300 may define the encapsulationarea E/A, and thus, an area between the dam structures 300 maycorrespond to the encapsulation area E/A.

The dam structure 300 may include a sealant 310, an outer dam bank 320,and an inner dam bank 330.

The sealant 310 may bond the first substrate 100 to the second substrate200. The sealant 310 may be formed of various materials well known tothose skilled in the art, such as a thermocurable resin, a photocurableresin, and/or the like.

The outer dam bank 320 and the inner dam structure 310 may be disposedon an outer surface and an inner surface, respectively, of the sealant310 to define a coating area where the sealant 310 is coated. The outerdam bank 320 and the inner dam structure 310 may be formed of the samematerial as that of a bank layer for defining a pixel area in theemission device layer 120 through the same process as the bank layer.For example, the outer dam bank 320 and the inner dam structure 310 maybe formed of an organic insulating material such as polyimide, photoacryl, benzocyclobutene (BCB), and/or the like.

The alignment marks 500 a and 500 b may not be covered by the sealant310 based on the position of the outer dam bank 320, which prevents thesealant 310 from spreading to the outside. Additionally, the active areaA/A may not be covered by the sealant 310 based on the position of theinner dam bank 330, which prevents the sealant 310 from spreading to theinside.

As shown by the expanded portion in FIG. 2, the outer dam bank 320 andthe inner dam bank 330 may have a concave-convex structure, whereby thesealant 310 is more efficiently prevented from spreading to the insideand the outside. However, the present disclosure is not limited thereto,and only one of the outer dam bank 320 and the inner dam bank 330 mayhave the concave-convex structure.

The outer dam bank 320 and the inner dam bank 330, as illustrated inFIG. 2, may be formed on each of the first substrate 100 and the secondsubstrate 200, but are not limited thereto. In other embodiments, theouter dam bank 320 may be formed on only one of the first substrate 100and the second substrate 200, and the inner dam bank 330 may be formedon only one of the first substrate 100 and the second substrate 200.

The alignment marks 500 a and 500 b may be disposed on the firstsubstrate 100. The alignment marks 500 a and 500 b may be formed of thesame material as that of an element of the circuit device layer 110 onthe first substrate 100, using the same, or a similar, process. Forexample, the alignment marks 500 a and 500 b may be formed of the samematerial as that of the gate line of the circuit device layer 110, usingthe same, or a similar, process, or may be formed of the same materialas that of the data line of the circuit device layer 110, using thesame, or a similar, process.

The alignment marks 500 a and 500 b may be disposed in the non-displayarea ND/A. The alignment marks 500 a and 500 b may include a firstalignment mark 500 a disposed in a portion of the non-display area ND/Awhich does not overlap the pad area P/A, and a second alignment mark 500b disposed in another portion of the non-display area ND/A overlappingthe pad area P/A. That is, the second alignment mark 500 b may bedisposed in the pad area P/A, and the first alignment mark 500 a may bedisposed in the non-display area ND/A not overlapping with the pad areaP/A.

The first alignment mark 500 a and the second alignment mark 500 b maybe disposed outside the dam structure 300. For example, the firstalignment mark 500 a and the second alignment mark 500 b may be disposedoutside the outer dam bank 320. As described above, according to anembodiment of the present disclosure, because the first alignment mark500 a and the second alignment mark 500 b are disposed outside the damstructure 300, the first alignment mark 500 a and the second alignmentmark 500 b are not covered by an encapsulating material such as the damstructure 300 or the filler 400 provided in the encapsulation area E/A,and thus, a scribing process is performed smoothly.

FIG. 3 is a plan view of an organic light emitting display deviceaccording to a second embodiment of the present disclosure.

As shown in FIG. 3, an active area A/A may be provided on a firstsubstrate 100, and a non-display area ND/A may be provided outside theactive area A/A. The non-display area ND/A may include a pad area P/A.

A dam structure 300 may be disposed in the non-display area ND/A, and afiller 400 may be disposed on an inner side of the dam structure 300,and the dam structure 300 may be disposed to surround the active areaA/A. The filler 400 may be provided to extend from the active area A/Ato the inner side of the dam structure 300. In order for the pad areaP/A to be exposed, the dam structure 300 may not be provided in the padarea P/A. An encapsulation area E/A, which includes the dam structure300 and the filler 400, may be provided in the active area A/A and apartial region of the non-display area ND/A, but may not be provided inthe pad area P/A.

A plurality of first alignment marks 500 a and second alignment marks500 b may be formed on an outer side of the dam structure 300. Thealignment marks 500 a and 500 b may be disposed in an edge area of thefirst substrate 100. As described above, the first alignment mark 500 amay be disposed in a portion of the non-display area ND/A which does notoverlap the pad area P/A, and the second alignment mark 500 b may bedisposed in another portion of the non-display area ND/A overlappingwith the pad area P/A.

Since the dam structure 300 is not disposed in the pad area P/A, thesecond align mark 500 b disposed in the pad area P/A does not overlapwith the dam structure 300, and thus, is not covered by the damstructure 300. However, because the first alignment mark 500 a and thedam structure 300 are disposed in the non-display area ND/A, which doesnot overlap with the pad area P/A, the first alignment mark 500 a mayoverlap with the dam structure 300, and thus, may be covered by the damstructure 300.

In an embodiment of the present disclosure, the shape of the damstructure 300 may be modified to prevent overlap of the dam structure300 and the first alignment mark 500 a. Thus, the first alignment mark500 a is not covered by the dam structure 300, thereby enabling thescribing process to be performed smoothly.

For example, the dam structure 300 may be wholly formed outside theactive area A/A and may have a shape corresponding to the active areaA/A, but in an area (see area C of FIG. 3) where the first alignmentmark 500 a is disposed, the dam structure 300 may not have a shapecorresponding to the active area A/A. That is, if the active area A/Ahas a rectangular structure, the dam structure 300 may also have arectangular structure, but in an edge area of the first substrate 100where the first alignment mark 500 a is disposed, the dam structure 300may not have an edge formed at a right angle.

The edge area of the first substrate 100 where the first alignment mark500 a is disposed will be described below in detail with respect to FIG.4.

FIG. 4 is an enlarged plan view of an area C of the organic lightemitting display device illustrated in FIG. 3.

As shown in FIG. 4, the dam structure 300 may include a first damstructure 300 a, a second dam structure 300 b, and a third dam structure300 c.

The first dam structure 300 a may be arranged in a first direction, forexample, a horizontal direction, and may have a rectilinear structure.The first dam structure 300 a may be arranged in parallel with anoutermost line La of the active area A/A in the first direction. Thefirst dam structure 300 a may include a first sealant 310 a, a firstouter dam bank 320 a, and a first inner dam bank 330 a. The firstsealant 310 a, the first outer dam bank 320 a, and the first inner dambank 330 a may all be arranged in parallel with the outermost line La ofthe active area A/A in the first direction. The first inner dam bank 330a may be spaced apart from the outermost line La of the active area A/Ain the first direction by a first distance D1.

The second dam structure 300 b may be arranged in a second direction,for example, a vertical direction, and may have a rectilinear structure.The second dam structure 300 b may be arranged in parallel with anoutermost line Lb of the active area A/A in the second direction. Thesecond dam structure 300 b may include a second sealant 310 b, a secondouter dam bank 320 b, and a second inner dam bank 330 b. The secondsealant 310 b, the second outer dam bank 320 b, and the second inner dambank 330 b may all be arranged in parallel with the outermost line Lb ofthe active area A/A in the second direction. The second inner dam bank330 b may be spaced apart from the outermost line Lb of the active areaA/A in the second direction by a second distance D2.

The third dam structure 300 c may have a rectilinear structure, and mayconnect the first dam structure 300 a to the second dam structure 300 b.The third dam structure 300 c may be connected to the first damstructure 300 a and the second dam structure 300 b at an incline. Thethird dam structure 300 c may be arranged not to be parallel to theoutermost line La of the active area A/A in the first direction and theoutermost line Lb of the active area A/A in the second direction. Thethird dam structure 300 c may be arranged apart from, and at an angleto, the vertex Lc at which the outermost line La in the first directionmeets the outermost line Lb in the second direction. Therefore, due tothe third dam structure 300 c, a shape of the dam structure 300 differsfrom that of the active area A/A. The third dam structure 300 c mayinclude a third sealant 310 c, a third outer dam bank 320 c, and a thirdinner dam bank 330 c. The third sealant 310 c, the third outer dam bank320 c, and the third inner dam bank 330 c may all be arranged not to beparallel to the outermost line La of the active area A/A in the firstdirection and the outermost line Lb of the active area A/A in the seconddirection, and each may be connected at an incline. The third inner dambank 330 c may be spaced apart from a vertex Lc, at which the outermostline La in the first direction meets the outermost line Lb in the seconddirection of the active area A/A, by a third distance D3.

The third sealant 310 c may be connected to each of the first sealant310 a and the second sealant 310 b. One end of the third sealant 310 cmay be connected to the first sealant 310 a, and the other end of thethird sealant 310 c may be connected to the second sealant 310 b.

The third outer dam bank 320 c may be connected to each of the firstouter dam bank 320 a and the second outer dam bank 320 b. One end of thethird outer dam bank 320 c may be connected to the first outer dam bank320 a, and the other end of the third outer dam bank 320 c may beconnected to the second outer dam bank 320 b.

The third inner dam bank 330 c may be connected to each of the firstinner dam bank 330 a and the second inner dam bank 330 b. One end of thethird inner dam bank 330 c may be connected to the first inner dam bank330 a, and the other end of the third inner dam bank 330 c may beconnected to the second inner dam bank 330 b.

As described above, the third dam structure 300 c may be connected toeach of the first and second dam structures 300 a and 300 b at anincline, and an area where a first alignment mark 500 a is formed may beprovided in an area outside the third dam structure 300 c. Therefore,overlap of the first align mark 500 a and the dam structure 300 b isprevented without increasing the size of the non-display area ND/A.Accordingly, a bezel size of the organic light emitting display deviceis reduced, and moreover, the scribing process is smoothly performed.

Moreover, a first distance D1 between the first inner dam bank 330 a andthe active area A/A, a second distance D2 between the second inner dambank 330 b and the active area A/A, and a third distance D3 between thethird inner dam bank 330 c and the active area A/A may be appropriatelymaintained so that the active area A/A does not cover and/or overlapwith the dam structure 300. For example, if the third distance D3 isreduced, the area where the first alignment mark 500 a is formed isenlarged, but if the reduction in third distance D3 is too great, theactive area A/A may be covered by the third sealant 310 c of the thirddam structure 300 c. Accordingly, when the third distance D3 is adjustedto be equal to or greater than the first distance D1 or the seconddistance D2, the active area A/A is not covered by, and/or does notoverlap with, the third sealant 310 c.

FIGS. 5A and 5B illustrate a position at which the first alignment markaccording to various embodiments of the present disclosure is disposed.

As shown in FIG. 5A, a first alignment mark 500 a disposed on an outerside of a third dam structure 300 c may be formed on an extension lineof a first dam structure 300 a or an extension line of a second damstructure 300 b.

Alternatively, as shown in FIG. 5B, a first alignment mark 500 bdisposed on an outer side of a third dam structure 300 c may be formedinward from an extension line of a first dam structure 300 a or anextension line of a second dam structure 300 b.

As described above, because the first alignment mark 500 a is formed on,or inward from, the extension line of the first dam structure 300 a orthe second dam structure 300 b, a non-display area (ND/A) is reduced,and thus, the bezel size of an organic light emitting display device islargely reduced.

FIGS. 6 and 7 are plan views of organic light emitting display devicesaccording to third and fourth embodiments, respectively, of the presentdisclosure. In these embodiments, the organic light emitting displaydevice illustrated in FIGS. 6 and 7 is the same as the organic lightemitting display device illustrated in FIG. 4, except that the structureof the third dam structure 300 c is modified. Hereinafter, onlydifferent elements will be described for brevity.

According to the embodiment illustrated in FIG. 4, the third damstructure 300 c may have a rectilinear structure. However, in theembodiments illustrated in FIGS. 6 and 7, the third dam structure 300 cmay have a curved structure.

For example, in FIG. 6, a center point of a curve structure of a thirddam structure 300 c may be disposed inward from the third dam structure300 c, and thus, the curve structure of the third dam structure 300 cmay be a structure which is convex on an outer side and concave on aninner side. In this case, a distance D3 between the third dam structure300 c and an outermost line Lc of an active area A/A is sufficientlysecured.

Moreover, in FIG. 7, a center point of a curve structure of a third damstructure 300 c may be disposed outward from the third dam structure 300c, and thus, the curve structure of the third dam structure 300 c may bea structure which is convex on an inner side and concave on an outerside. In this case, an area where a first alignment mark 500 a isdisposed is formed outside the third dam structure 300 c, and issufficiently secured.

FIG. 8 is a plan view of an organic light emitting display deviceaccording to a fifth embodiment of the present disclosure. The organiclight emitting display device illustrated in FIG. 8 is the same as theorganic light emitting display device illustrated in FIG. 3, except thatthe structure of the dame structure 300 is modified. Hereinafter, onlydifferent elements will be described for brevity.

As shown in FIG. 8, a dam structure 300 may include two first damstructures 300 a that are arranged in a first direction to have arectilinear structure, two second dam structures 300 b that are arrangedin a second direction to have a rectilinear structure, and four thirddam structures 300 c that have a rectilinear structure are inclined withrespect to the first dam structures 300 a and the second dam structures300 b, and connect the first dam structures 300 a to the second damstructures 300 b.

In the above-described structure illustrated in FIG. 3, the third damstructure 300 c may be disposed near the first alignment mark 500 a, butthe third dam structure 300 c may not be disposed near, or overlap with,the second alignment mark 500 b. Therefore, in a portion near the secondalignment mark 500 b, the first dam structure 300 a and the second damstructure 300 b may be directly connected to each other and may have ashape corresponding to an outermost line of an active area A/A.

On the other hand, according to the embodiment illustrated in FIG. 8, athird dam structure 300 c may be disposed near the first alignment mark500 a and another third dam structure 300 c may be disposed near thesecond alignment mark 500 b, thereby reducing the possibility that thesecond alignment mark 500 b disposed in a pad area P/A is covered by, oroverlaps with, the dam structure 300.

FIGS. 9 and 10 are plan views of organic light emitting display devicesaccording to sixth and seventh embodiments of the present disclosure.The organic light emitting display device illustrated in FIGS. 9 and 10are the same as the organic light emitting display device illustrated inFIG. 8, except that the third dam structure 300 c is modified such thatthe third dam structure 300 c in FIGS. 9 and 10 have a curved structure.

The organic light emitting display device illustrated in FIG. 9 may beimplemented by applying the third dam structure 300 c of FIG. 6 to fouredge areas. Similarly, the organic light emitting display device of FIG.10 may be implemented by applying the third dam structure 300 c of FIG.7 to four edge areas.

FIGS. 11-13 are schematic plan views of an organic light emittingdisplay device according to additional embodiments of the presentdisclosure. The organic light emitting display devices illustrated inFIGS. 11-13 are similar to the organic light emitting display deviceillustrated in FIGS. 8-10, respectively, except that both the first andsecond alignment marks 500 a and 500 b, respectively, are disposed nearthe third dam structure 300 c, and neither the first and secondalignment marks are disposed in the pad area.

The organic light emitting display device according to the embodimentsof the present invention may be applied as various types well known tothose skilled in the art, such as a top emission type, a bottom emissiontype, etc.

As described above, according to various embodiments of the presentdisclosure, the alignment mark may not be covered by, and may notoverlap with, the dam structure, because the alignment mark is disposedoutside the dame structure. Thus, the scribing process is performedsmoothly.

Particularly, according to various embodiments of the presentdisclosure, the third dam structure may be connected to each of thefirst and second dam structures at an incline, and the first alignmentmark may be disposed outside the third dam structure, thereby preventingthe first alignment mark from being covered by, or overlapping with, thedam structure without increasing the size of the non-display area.Accordingly, the bezel size of the organic light emitting display deviceis reduced, and the scribing process may be performed smoothly.

It will be apparent to those skilled in the art that variousmodifications and variations can be made to the present disclosurewithout departing from the spirit or scope of the intended inventions.The present disclosure covers the modifications and variations of theinvention described therein, provided they fall within the scope of anyappended claims and their equivalents.

What is claimed is:
 1. An organic light emitting display devicecomprising: a substrate including an active area including a pluralityof pixels to display an image and a non-display area provided outsidethe active area; a dam structure in the non-display area of thesubstrate; and a first alignment mark outside the dam structure in thenon-display area of the substrate, wherein the dam structure comprises afirst portion having a shape that corresponds to an outermost line ofthe active area and a second portion having a shape that does notcorrespond to the outermost line of the active area, and the firstalignment mark is disposed outside the second portion of the damstructure.
 2. The organic light emitting display device of claim 1,wherein the second portion of the dam structure is provided at an edgearea of the substrate.
 3. The organic light emitting display device ofclaim 1, wherein the first portion comprises a first dam structurearranged in a first direction and a second dam structure arranged in asecond direction, and the second portion comprises a third dam structureconnected to each of the first dam structure and the second damstructure at an incline.
 4. The organic light emitting display device ofclaim 3, wherein the first dam structure and the second dam structureare arranged in parallel with an outermost line of the active area inthe first direction and an outermost line of the active area in thesecond direction, respectively, and the third structure is arrangedapart from, and at an angle to, a vertex at which the outermost line ofthe active area in the first direction meets the outermost line of theactive area in the second direction.
 5. The organic light emittingdisplay device of claim 3, wherein the first dam structure comprises afirst sealant, a first outer dam bank disposed on an outer side of thefirst sealant, and a first inner dam bank disposed on an inner side ofthe first sealant, the second dam structure comprises a second sealant,a second outer dam bank disposed on an outer side of the second sealant,and a second inner dam bank disposed on an inner side of the secondsealant, the third dam structure comprises a third sealant, a thirdouter dam bank disposed on an outer side of the third sealant, and athird inner dam bank disposed on an inner side of the third sealant, oneend of the third sealant is connected to the first sealant, and theother end of the third sealant is connected to the second sealant, oneend of the third outer dam bank is connected to the first outer dambank, and the other end of the third outer dam bank is connected to thesecond outer dam bank, and one end of the third inner dam bank isconnected to the first inner dam bank, and the other end of the thirdinner dam bank is connected to the second inner dam bank.
 6. The organiclight emitting display device of claim 5, wherein at least one of thethird outer dam bank and the third inner dam bank has a concave-convexstructure.
 7. The organic light emitting display device of claim 3,wherein the first alignment mark is disposed inward from an extensionline of the first dam structure or the second dam structure.
 8. Theorganic light emitting display device of claim 1, wherein the firstalignment mark is provided between a scribing line of the substrate andthe dam structure.
 9. The organic light emitting display device of claim1, wherein the first alignment mark substantially overlaps an imaginaryline extended from the first portion of the dam structure.
 10. Theorganic light emitting display device of claim 1, further comprising anemission device layer in the active area of the substrate and apassivation layer covering a top and a side surface of the emissiondevice layer.
 11. The organic light emitting display device of claim 1,further comprising an emission device layer in the active area of thesubstrate, a passivation layer on the emission device layer, and afiller on the passivation layer.
 12. The organic light emitting displaydevice of claim 1, further comprising an emission device layer in theactive area of the substrate, and an encapsulation layer encapsulatingthe emission device layer and extending to the dam structure.
 13. Theorganic light emitting display device of claim 12, wherein theencapsulation layer comprises a passivation layer on the emission devicelayer and a filler on the passivation layer.
 14. The organic lightemitting display device of claim 12, wherein light emitted from theemission device layer penetrates the encapsulation layer and moves to anexternal over the encapsulation layer.
 15. The organic light emittingdisplay device of claim 1, wherein the plurality of pixels comprises acircuit device layer having a gate line and a data line, and the firstalignment mark is formed of a same material as that of the gate line orthe data line.
 16. The organic light emitting display device of claim 1,wherein a distance between the second portion of the dam structure andthe active area is equal to or greater than a distance between the firstportion of the dam structure and the active area.
 17. The organic lightemitting display device of claim 1, wherein the substrate comprises apad area in the non-display area, and a second alignment mark is furtherprovided in the pad area.
 18. The organic light emitting display deviceof claim 17, wherein the dam structure is not disposed in the pad area.19. The organic light emitting display device of claim 1, wherein thesubstrate comprises a pad area in the non-display area, and a secondalignment mark is disposed outside the third dam structure such that thesecond alignment mark does not overlap with the pad area.
 20. Theorganic light emitting display device of claim 19, wherein the damstructure is not disposed in the pad area.